Add mirrors tests

test/codegen/lib/mirrors/metadata_allowed_values_import.dart

Index: test/codegen/lib/mirrors/metadata_allowed_values_import.dart
diff --git a/test/codegen/language/create_unresolved_type_test.dart b/test/codegen/lib/mirrors/metadata_allowed_values_import.dart
similarity index 70%
copy from test/codegen/language/create_unresolved_type_test.dart
copy to test/codegen/lib/mirrors/metadata_allowed_values_import.dart
index ceaf6dc421edb871d8741f36f23b83b50c23a897..67df4e21ab29a23c7cf0b83f32a8b6c8a6dea776 100644
--- a/test/codegen/language/create_unresolved_type_test.dart
+++ b/test/codegen/lib/mirrors/metadata_allowed_values_import.dart
@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-main() {
-  new F<int>();  /// 01: runtime error, static type warning
+class Imported {
+  const Imported();
+  const Imported.named();
+  static const CONSTANT = 0;
 }